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Environ Sci Pollut Res Int

Title:		Influence of the inlet air in efficiency of photocatalytic devices for mineralization of VOCs in air-conditioning installations
Author(s):		Jimenez-Relinque E; Castellote M;
Address:		"Institute of Construction Sciences Eduardo Torroja, IETcc, CSIC, Serrano Galvache, 4, Madrid, Spain, eva.jimenez@csic.es"
Journal Title:		Environ Sci Pollut Res Int
Year:		2014
Volume:		20140304
Issue:		19
Page Number:		11198 - 11207
DOI:		10.1007/s11356-014-2632-2
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"Nowadays, a large proportion of photocatalytic oxidation (PCO) devices are being implemented in heating, ventilation and air-conditioning systems. However, no systematic studies have been carried out regarding the influence of inlet air preconditioning. To analyse the impact of the inlet air-conditions into photocatalytic efficiency, a simulated air-conditioning duct with flowing gas through inside was designed. Isobutylene was chosen as the target VOCs. The concentration in the gas phase was monitored using a photoionization detector. The influence of flow rate, relative humidity and temperature on the VOC removal efficiency was analysed. Experimental results were presented in terms of gas-removal efficiency (eta) and clean air delivery rate (CADR) and analysed on a kinetic basis. From them, the weight of each parameter in the global process has been determined, from bigger to smaller contribution, flow>>temperature>relative humidity. Also, the relevance of the inlet air conditions has been illustrated in a model room in order to determinate the time necessary to obtain a threshold value accomplishing with enough air quality and the energy consumption of the device. Additionally, the photocatalytic decontamination has been assimilated to the 'air exchange rate', a parameter commonly used in indoor air quality studies. The results show that preconditioning of air can improve the efficiency of photocatalytic devices and bring important energy savings"
Keywords:		"*Air Conditioning *Air Movements Air Pollutants/*analysis Air Pollution, Indoor/*analysis Catalysis Decontamination Humidity Kinetics Models, Chemical Oxidation-Reduction *Photochemical Processes Temperature Volatile Organic Compounds/*chemistry;"
Notes:		"MedlineJimenez-Relinque, E Castellote, M eng Research Support, Non-U.S. Gov't Germany 2014/03/04 Environ Sci Pollut Res Int. 2014 Oct; 21(19):11198-207. doi: 10.1007/s11356-014-2632-2. Epub 2014 Mar 4"